TAH CHUNG STEEL CORP.

Boron Steel

1.ＳＡＥ—Society of automotive engineers:10B21 10B33 10B38 15B21

Material Description

Added boron into carbon steel, in order to enhance the hardness and strength of the original 1022 and 1038 carbon steels after heat treatment, the effect of improving heat treatment is obvious.

Mainly used in producing grade of 8.8-10.9 screws, bicycle pedal axle, center core, saddle bracket.

Common used materials：10B21、10B33、10B38、15B21

PROCESS

If you have other requested specification, please contact with sales or highlight on the order.

Applications

Carriage bolt

Hardware parts

Hexagon socket screws

Bicycle pedal

Chemical Composition

SAE Carbon and Carbon Boron Hardenability-Steels(H steels)

UNS	SAE	Chemical Composition %
UNS	SAE	C	Mn	P	S	Si	Others
H15211	15B21H	0.17~0.24	0.70~1.20	0.030 以下	0.050 以下	0.15~0.35	B：0.0005~0.003
H15281	15B28H	0.25~0.34	1.00~1.50
H15301	15B30H	0.27~0.35	0.70~1.20
H15351	15B35H	0.31~0.39	0.70~1.20
H15371	15B37H	0.30~0.39	1.00~1.50
H15411	15B41H	0.35~0.45	1.25~1.75
H15481	15B48H	0.43~0.53	1.00~1.50
H15621	15B62H	0.54~0.67	1.00~1.50			0.40~0.60

CSC Specifications － Boron Steels and Cr-V-B Steels

CSC	Chemical Composition %
CSC	C	Si	Mn	P	S	Cr	V	B
50BV30	0.27-0.33	0.10	0.70~1.00	0.030	0.030	0.30~0.50	0.10~0.15	0.0005

Package
Wire		Wire Carrier		Bar

Diameter	0.6MM~50MM	Diameter	0.6MM~50MM	Diameter	0.6MM~50MM
ID	200MM ~ 1000MM	Wire Carrier Width	420MM~1000MM	Non chamfered L	2M~6M
OD	400MM ~ 1200MM	Chassis W	1300MM~1600MM	Chamfer L	2.5M~4M
Packing Method	PE IN＋PP OUT	Wire Carrier Height	1000MM~1200MM	Packing Method	PE IN＋PP OUT
Weight	40KG~2250KG	Packing Method	300kg~2250kg	Weight	250KG~2250KG
Roll Direction	Counter Clockwise or Clockwise	Weight	300kg~2250kg